Ok, I've been seeing some subterranean mentions to problems with LCD backlighting after installing Tiger. Some say they touch the brightness buttons and the backlight turns off, others say that the backlight won't come up after getting out of sleep, etc.

My Pismo's backlight was turning off 3 seconds after turning on at boot, and in the meantime flickered, whined and had strange horizontal lines.

That was yesterday. I couldn't work all day and was already breaking into a cold sweat, because I don't have the cash to buy a new 'Book and I'm saving for the G4/550 upgrade.

Today it's fine as roses. I'm on Tiger 10.4.0